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Goodwill, Deferred Leasing Costs and Other Intangibles - Amortization of Intangible Assets and Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Finite-Lived Intangible Assets [Line Items]        
Net increase (decrease) to rental income $ (135) $ 306 $ 74 $ 175
Amortization expense 51,036 62,916 95,796 108,167
Investment management intangibles        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense 10,721 5,055 16,811 10,110
Deferred leasing costs and lease-related intangibles        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense 34,525 50,400 67,368 84,107
Customer relationships and service contracts        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense 4,212 5,886 8,461 10,800
Trade name        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense 1,098 1,098 2,196 2,196
Other        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense $ 480 $ 477 $ 960 $ 954